Копирование части экрана консоли

Process p1 = new Process();
p1.StartInfo.UseShellExecute = true;
p1.StartInfo.RedirectStandardOutput = false;
p1.StartInfo.FileName = "cmd.exe";
p1.StartInfo.Arguments = "dir >> log.txt";
p1.Start();
p1.WaitForExit();

public static unsafe void MoveBufferArea(int sourceLeft, int sourceTop, int sourceWidth,
 int sourceHeight, int targetLeft, int targetTop, char sourceChar, 
 ConsoleColor sourceForeColor, ConsoleColor sourceBackColor)
{
    if ((sourceForeColor < ConsoleColor.Black) || (sourceForeColor > ConsoleColor.White))
    {
      throw new ArgumentException(Environment.GetResourceString("Arg_InvalidConsoleColor"), 
         "sourceForeColor");
    }
    if ((sourceBackColor < ConsoleColor.Black) || (sourceBackColor > ConsoleColor.White))
    {
      throw new ArgumentException(Environment.GetResourceString("Arg_InvalidConsoleColor"),
        "sourceBackColor");
    }
    Win32Native.COORD dwSize = GetBufferInfo().dwSize;
    if ((sourceLeft < 0) || (sourceLeft > dwSize.X))
    {
       throw new ArgumentOutOfRangeException("sourceLeft", sourceLeft, 
         Environment.GetResourceString("ArgumentOutOfRange_ConsoleBufferBoundaries"));
    }
    if ((sourceTop < 0) || (sourceTop > dwSize.Y))
    {
        throw new ArgumentOutOfRangeException("sourceTop", sourceTop, 
         Environment.GetResourceString("ArgumentOutOfRange_ConsoleBufferBoundaries"));
    }
    if ((sourceWidth < 0) || (sourceWidth > (dwSize.X - sourceLeft)))
    {
        throw new ArgumentOutOfRangeException("sourceWidth", sourceWidth, 
          Environment.GetResourceString("ArgumentOutOfRange_ConsoleBufferBoundaries"));
    }
    if ((sourceHeight < 0) || (sourceTop > (dwSize.Y - sourceHeight)))
    {
        throw new ArgumentOutOfRangeException("sourceHeight", sourceHeight, 
          Environment.GetResourceString("ArgumentOutOfRange_ConsoleBufferBoundaries"));
    }
    if ((targetLeft < 0) || (targetLeft > dwSize.X))
    {
        throw new ArgumentOutOfRangeException("targetLeft", targetLeft, 
          Environment.GetResourceString("ArgumentOutOfRange_ConsoleBufferBoundaries"));
    }
    if ((targetTop < 0) || (targetTop > dwSize.Y))
    {
        throw new ArgumentOutOfRangeException("targetTop", targetTop, 
          Environment.GetResourceString("ArgumentOutOfRange_ConsoleBufferBoundaries"));
    }
    if ((sourceWidth != 0) && (sourceHeight != 0))
    {
        bool flag;
        Win32Native.CHAR_INFO[] char_infoArray3;
        new UIPermission(UIPermissionWindow.SafeTopLevelWindows).Demand();
        Win32Native.CHAR_INFO[] char_infoArray = 
                                 new Win32Native.CHAR_INFO[sourceWidth * sourceHeight];
        dwSize.X = (short) sourceWidth;
        dwSize.Y = (short) sourceHeight;
        Win32Native.COORD bufferCoord = new Win32Native.COORD();
        Win32Native.SMALL_RECT readRegion = new Win32Native.SMALL_RECT();
        readRegion.Left = (short) sourceLeft;
        readRegion.Right = (short) ((sourceLeft + sourceWidth) - 1);
        readRegion.Top = (short) sourceTop;
        readRegion.Bottom = (short) ((sourceTop + sourceHeight) - 1);
        fixed (Win32Native.CHAR_INFO* char_infoRef = char_infoArray)
        {
            flag = Win32Native.ReadConsoleOutput(ConsoleOutputHandle, char_infoRef, dwSize,
                    bufferCoord, ref readRegion);
        }
        if (!flag)
        {
            __Error.WinIOError();
        }
        Win32Native.COORD dwWriteCoord = new Win32Native.COORD();
        dwWriteCoord.X = (short) sourceLeft;
        Win32Native.Color color = (Win32Native.Color) ((short) 
           (ConsoleColorToColorAttribute(sourceBackColor, true) | 
            ConsoleColorToColorAttribute(sourceForeColor, false)));
        short wColorAttribute = (short) color;
        for (int i = sourceTop; i < (sourceTop + sourceHeight); i++)
        {
            int num2;
            dwWriteCoord.Y = (short) i;
            if (!Win32Native.FillConsoleOutputCharacter(ConsoleOutputHandle, 
                  sourceChar, sourceWidth, dwWriteCoord, out num2))
            {
                __Error.WinIOError();
            }
            if (!Win32Native.FillConsoleOutputAttribute(ConsoleOutputHandle, 
                      wColorAttribute, sourceWidth, dwWriteCoord, out num2))
            {
                __Error.WinIOError();
            }
        }
        Win32Native.SMALL_RECT writeRegion = new Win32Native.SMALL_RECT();
        writeRegion.Left = (short) targetLeft;
        writeRegion.Right = (short) (targetLeft + sourceWidth);
        writeRegion.Top = (short) targetTop;
        writeRegion.Bottom = (short) (targetTop + sourceHeight);
        if (((char_infoArray3 = char_infoArray) == null) || (char_infoArray3.Length == 0))
        {
            char_infoRef2 = null;
            goto Label_02C4;
        }
        fixed (Win32Native.CHAR_INFO* char_infoRef2 = char_infoArray3)
        {
        Label_02C4:
            flag = Win32Native.WriteConsoleOutput(ConsoleOutputHandle, char_infoRef2,
                   dwSize, bufferCoord, ref writeRegion);
        }
    }
}